Alarm-clock



(No Model.)

J. W. BREWSTER. ALARM GLOGK.

No. 588,550. Patented Au 24,1897.

WITNESSES INVENTOR @{MQM j Z c J Q I Allomzy UNITED STATES PATENT OEEICE.

JOHN \V. BREVSTER, OE UNION CROSS-ROADS, TENNESSEE.

ALARM-CLOCK.

SPECIFICATION forming part of Letters Patent No. 588,550, dated August 24, 1897.

Application filed January 9, 1897.

To all whom it may concern:

Be it known that 1, JOHN W. BREWSTER, a citizen of the United States, residing at Union Gross-Roads, in the county of Roane and State of Tennessee, have invented certain newand useful Improvements in Alarm Mechanism for Clocks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as Will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to alarm mechanism for clocks, and has for its object to provide a simple and efficient device in the form of an attachment applicable either to spring-actuated or Weight-actuated clocks for the purpose of indicating by an audible alarm that the clock is about to run down and that the same needs rewinding.

To this end the invention consists in certain novel features and details of construction and arrangement of parts, as hereinafter fully described, illustrated in the drawings, and incorporated in the claims.

In the accompanying drawings, Figure 1 is a perspective view of the improved attachment. Fig. 2 is a View in elevation, showing the same applied to a weight-actuated clock and illustrating the manner in which the alarm mechanism is actuated by the descending weight.

Similar n umerals of reference designate corresponding parts in both figures of the drawings.

The improved attachment com prises a basepieee 1,which maybe either of wood or metal, and upwardly-extending bearing-pieces 2, secured thereto and arranged at a suitable distance apart. Interposed between the bearing-pieces 2 is a bell or gong 3 of any desired form, the same being secured to the base 1. Upon one of the bearing-pieces 2 is f ulcrumed the hammer 1-. This hammer is carried by an arm 5, which is connected at one end to a rock-shaft 6, having a spiral spring 7 disposed around the same and connected at one ter minal to said rockshaft, while the other terminal bears against the bearing-piece 2, the tension of said spring being exerted to throw the hammer against the bell after said hammer has been raised and released. The rockshaft is journaled in ears 7 on the bearing- Serial No. 618,587. (No model.)

piece 2 and is also provided with an arm 8, which extendstoward and partially over the bell or gong Journaled upon the remaining bearingpiece 2 is a second rock-shaft 9, mounted in spaced ears 10, projecting from the upper side of said bearing-piece.

11 designates a lever which is secured intermediate its ends to the rock-shaft 9. One arm of this rock-shaft extends over the bell and has its extremity bent at an angle to the main body of the lever and provided at its end with a triangularly-shaped catch-lip 12, which is adapted to engage with the arm 8 of the hammer for lifting the same. The opposite end of the lever 11 is adapted to be arranged under the descending weight of the clock, so as to be depressed by the same,thereby lifting the opposite end of the lever and operating the hammer. A spiral spring 12 is disposed around the rock-shaft E),having one terminal in engagement therewith and the other terminal resting against the bearingpiece 2, the tension of said spring being exerted to lift the outer end of the lever 11 and depress the opposite end thereof, so as to cause the same to engage with the arm 8 of the hammer.

The attachment hereinabove described is placed in the bot-tom of a clock-case, so that the outer end of the lever 11 will lie in the path of the descending weight.

As the weight moves downward and just before the clock runs down said weight rocks the lever 11, thereby lifting that end which carries the lip and causing the same to engage the arm 8, thus elevating the bell-hammer. After the lever 11 has been rocked a sufficient distance the extremity of the arm 8 passes 01f the catch-lip of the lever and the spring 011 the rock-shaft of the hammer, so as to throw said hammer quickly against the bell or gong, thus notifying a person in the room that the clock is about to run down and that the same needs rewinding.

iVhile the improved attachment has been shown and described as applied to a weightactuated clock, it will be apparent that the same may also be used in connection with spring-clocks by actuating the lever with any suitable part of the clockworks.

The attachment is very simple in con struction and reliable in operation and may be readily applied to any clock already in use.

Having thus described the invention, What is claimed as new is- 1. An attachment for clocks, comprising a suitable base or frame, a bell mounted thereon, a rock-shaft, an arm extending therefrom and carrying the bellhan'1mer,a second arm connected to said rock-shaft for operating it, a spring for giving the bell-hammer a normal tendency, and a spring-actuated lever fulcru med intermediate its ends and provided at one end with a catch-lip engaging the operating-arm of the bell-hammer, the opposite end of said lever being adapted for engagementwith the clock mechanism,substantially as described.

2. An attachment for clocks comprising a suitable base or frame, a bell mounted there- JOHN XV. BRIHVS ER.

Witnesses:

Jnssn FRITTS, CHARLEY Fnrrrs. 

